Re: [LKP] [tools] 6534770d6f: kernel_selftests.bpf.test_lwt_seg6local.fail

On Thu, 1 Nov 2018 11:26:44 +0800, kernel test robot wrote:

FYI, we noticed the following commit (built with gcc-7):

commit: 6534770d6f176093b50896961107b2d545ef38f0 ("tools: bpf: fix BTF code added twice to different trees")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

That's a fix to a merge commit, perhaps something before broke it?

in testcase: kernel_selftests
with following parameters:

	group: kselftests-00

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: 80 threads Skylake with 64G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


commit:
  6b431d50d2a8acd1c418b998b856a055252ebc3a
  6534770d6f176093b50896961107b2d545ef38f0

6b431d50d2a8acd1 6534770d6f176093b508969611
---------------- --------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
        443:8        14689%        1618:8     dmesg.timestamp:last
           :8          100%           8:8     kernel_selftests.bpf.test_lwt_seg6local.fail
           :8          100%           8:8     kernel_selftests.bpf.test_lwt_seg6local.sh.fail




To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen